Incubator.



fm1. 18', 190s.-

PATENTED APPLICATION TILE-D MAY 3l, 1907.

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JOEL A. SWENSQN, OF MINNEAPOLIS, MlNNESOTA.

LNCUBATOR.

Specification of Letters Patent.

Patented Aug. 118, 1908.

Application filed Hay 31, 1907. Serial No. 376,624.

To all whom it may concern.'

Be it known that l., JOEL A. SwENsoN, ci`

. lowing is a specification.

,The object of my invention is to provide an improved hot water heating system for incubators whereby a larger volume of water can be circulated through the incubator and a more uniform heat obtained.

A further object is to provide improved means for turning the eggs without opening the incubator.

In the accompanying drawings,. forming part of this specification, Figure 1 is a longitudinal vertical sectional view of an incubator embodying my invention. Fig. 2 isa horizontal sectional view on the line .r-ot' Fig. 1. Fig. 3 is a vertical transverse sectional view on the line fl/-g/.ot Fig. 1. Fig. 4 is a detail view of theV tray or rack on which the eggs are placed.

In"tn` drawings, 2 represents theouter casing .of "the machine supportedrupon the..

legs and 4, the inner walls spaced from the outer walls in`the usual way and having sheets of asbestos 5 or other suitable nonheat-conducting material arranged between the inner and outer walls `for the purpose of confining the heat in the egg chamber. This chamber, which l will designate by the refierence numeral 6, contains an egg tray 7 on which the eggs are 'placed in rows. Upon the tray I arrange a rack' consisting of side bars 8 connected with one another at each end of the egg tray by cross bars 9 and also connected at intervals between said cross bars by narrow strips 10, preferably of' metal, which extend between the cross rows of eggs and contact with the lower portion thereof, so that when the bars 8 are moved lengthwise on said tray the eggs will be rolled thereon ,and` turned completely over. As indicated in Fig. 1 a suiiieient space is lleft on `the tray at `the ends of the rack to allow for the turning of the eggs. Hand pieces 11 extend through the end .of the incubator and vhave notched ends to engage the cross bar 9 so that the operator can grasp the outer ends 0f the hand pieces and move the rack back' and forth on the egg tray. The rack is removable through, the usual side door of the incubator which l have not illustrated herein. The cross bars 9 sliding in l he notches of the hand pieces 11 permit such removal- For the purpose of heating the egg chamF berl provide a drum 12 having a iilling opening 14 tl'irough which a supply of water may be poured into the drum. A pipe 15 is open at each end and extends entirely through the drum, and beneath the open end of the pipe l() l arrange a heating lamp 16 supported on a shelf i7 that is vertically adjustable on a rod 18 by means of a nut 19 'fitting on the threaded lower end of said rod. The pipe 15 is entirely surrounded by the water 1n the drum and a circulating pipe 20 leads Jfrom the top of the drum and,

extends through the upper portion of the egg chamber to the opposite end oi the incubator- At this point pipes 21 branch laterally from eaeh side oi the pipe 2() and extend to the side walls ci' the incubator' and from thence 'parallel with one another along the top oi the egg chamber and at the end of sind chamber contiguous to the heating drum the said pipes 21 pass through the water in the drunrheated by the lamp willrise to the top of the drum and llow out through the pipe 2O alongl the middle of the egg chamber and then out to the sides of the chamber and back through the pipes 21 also in the top oi' the egg chamber and iinally ilow down through the inclined pipes 22' into the lower portion of' the heating drum. In this way a 'complete and rapid circulation is maintained throughout the air chamber and a uniform temperatjur is established over and around the eggs.

l referto provide a shell or casing 24 slidaily supported between guides 13 and the wall of the incubator and inclosingthe heating drum 12, a space 25 being formed between them. Plates 27 and 27 close the space between the shell 24 andthe drum 12 and the plate 27 has a series of holes 26 therein through which fresh air is admitted into the space between the drum and the casing and this air after circulating around the drum passes through the holes 28 into the egg chamber. ln the wall of the egg chamber opposite from the end where the heating drum is located, l provide a ventiF lating hole 2.) through which the foul air in land. outer Walls of thechamber and through A the hole 30 to the open air.

shaped extension which communicates with I claim as my invention: v

1 An incubator comprising a casing having an-egg ehamber,. a drum adapted to contain waterl supported outside said casing, a.t shell inclosing said drum and spaced rom the Walls thereof! said shell having a series of perforations in its le. rer end. through which cold air is admitted into the space between said shell and drum and said' casing having holes leading into said egg chamber and communicating with the Ispace between saidsheli and drum, a pipe open at each end extending veiticail'-',7 from said drum, a heating` means' provided beneath the open lower end. of said pi e and circulating pipes extending throng?r said egg chamber and conu nected with said drum said circulating pipes comprising a supply pi )elleadinf from the upper end of said drum ioiizonta ly through the. top of the egg chamber, and return pipes in substantially the same plane as said" supply pipe and provided ywith a V- tlie lower portion of said drum.

' conti uous cease? 2. An incubator comprising e casing having an egg chamber, a heatin drum sup'- ported outside said casing an adapted to contain asup ly of Water, a single pipe ooniiected with t e upper portion of said; drum and extending horizontally through a Wall of the casing and lengthwise o' said eg;i .chamber in the up ei'- portion thereof, sai pipe having lateral y turned ends and liorizontai pipes attacliedfto said ends and eX- tending horizontally and paialiel with said iirst named pipe to the enti oi said casing attac ed to lthe ends of inst named pipes and having their lower ends united, and a shortIv oi'ming-a V--shepeil section pipe section communicating with. the apex portion of 'saigl xi-section and extending 4through the Wiiii' of seul-casing into the lower portionof siiiil drum whereby :if coinplete circulation `oiftlie water through siiiil egg? chamber will be obtained. f

.n witness whereof, iV have hereunto set my hand this 29th 4day of May, 1907.

i OEL S'WENSON. Witnesses: y

I "5.15. ER/n I. M. Pifiri. i

ark*

40 to said drum, depending pipes 

